It's vs. Its: What's the Difference and How to Use Each Correctly

Updated May 2026.

The difference between it's and its is one of the most common grammar questions in English. Both words sound exactly the same. The only visual difference is a single apostrophe. That's why even experienced writers mix them up. The good news is that once you understand what each word does, choosing between them is straightforward every time.

It's vs. Its: At a Glance

What Does It's Mean?

It's with an apostrophe is a contraction. A contraction is a shortened form of two words joined together, like don't (do not), won't (will not), and isn't (is not). In the same way, it's is a shortened form of either "it is" or "it has."

Use it's whenever you mean "it is" or "it has." Examples:

• It's raining outside. (It is raining outside.)
• It's been a long day. (It has been a long day.)
• It's time to submit the report. (It is time to submit the report.)

Note that contractions are typically avoided in very formal writing. In an academic paper or a legal document, write "it is" or "it has" rather than it's. In everyday writing and most professional contexts, the contraction is fine.

What Does Its Mean?

Its without an apostrophe is a possessive pronoun. It works the same way as his, her, and their. The word shows that something belongs to or is associated with a thing or animal already mentioned.

Use its when you mean "belonging to it." Examples:

• The dog wagged its tail.
• The company revised its policy.
• The report lost its impact after the revisions.
• The book is interesting in its own way.

Note that its' with an apostrophe after the word is never correct in standard English. The form simply doesn't exist. The possessive is always written as its with no apostrophe at all.

The Key Difference Explained

The clearest way to understand the difference is this. In English, apostrophes in contractions show where letters have been removed. It's has an apostrophe because the letter "i" from "is" or the letters "ha" from "has" have been dropped. Its has no apostrophe because possessive pronouns in English never take apostrophes.

This is the same reason his, hers, ours, yours, and theirs are all written without apostrophes. The 's at the end of these words is not a possessive marker. It's part of the word itself.

A Brief History: Why Its Doesn't Have an Apostrophe

For most of English history, the possessive form of "it" was his. In the King James Bible (1611), readers find phrases like "if the salt have lost his savour." The neuter possessive its didn't fully enter English until the late 1500s and early 1600s.

When its first appeared, it was sometimes spelled with an apostrophe: it's. Writers used it the same way they wrote April's or the dog's. By the 1700s, the apostrophe form was dropped. The word settled into the form we use today: its for possession, it's only as a contraction.

Knowing this history makes the rule easier to remember. The apostrophe in it's always means letters are missing.

How to Test Which Word to Use

When you're unsure whether to write it's or its, apply the substitution test. Replace the word in your sentence with "it is" or "it has" and read it back. If the sentence still makes sense, use it's. If it doesn't, use its.

Here's the test in practice.

• "The dog scratched its leg." Try: "The dog scratched it is leg." That doesn't make sense, so its is correct.
• "The boy said it's fun to laugh." Try: "The boy said it is fun to laugh." That makes sense, so it's is correct.
• "The committee finished its review." Try: "The committee finished it is review." That doesn't make sense, so its is correct.
• " It's been three weeks since the deadline." Try: "It has been three weeks since the deadline." That makes sense, so it's is correct.

Memory Tricks That Always Work

A few simple tricks make the difference easy to remember.

• The apostrophe trick.
  An apostrophe always signals missing letters. If letters can be added back ("it is" or "it has"), use it's. If nothing was removed, no apostrophe is needed.
• The possessive pronoun trick.
  Possessive pronouns in English never take apostrophes. If you wouldn't write her's, their's, or your's, don't write it's when you mean possession.
• The substitution trick.
  Read the sentence aloud and swap in "it is" or "it has." If the sentence still works, the contraction is correct.
• The its' rule.
  The form its' with an apostrophe after the word doesn't exist. If you're tempted to write it, you mean its.

Common Mistakes

These are the errors that come up most often, even in published writing.

• Using it's for possession.
  "The dog wagged it's tail" is wrong. The correct form is "The dog wagged its tail." The dog is not "it is" tail.
• Using its for the contraction.
  "Its been a long day" is wrong. The correct form is " It's been a long day." The sentence means "It has been a long day."
• Writing its' with an apostrophe at the end.
  This form doesn't exist. The possessive is always its.
• Trusting autocorrect.
  Some word processors and phone keyboards automatically change its to it's because the contraction is more common in casual writing. Always proofread your final document by hand.

It's vs. Its in Professional Writing

In professional writing, this small error has an outsized effect on how the work is read. A reader who notices an its / it's mistake on the first page will read the rest of the document looking for more errors.

Three contexts demand particular care.

• Academic writing.
  Most academic style guides discourage contractions. Replace it's with "it is" or "it has" throughout. Use its for possession.
• Business communications.
  Email subject lines, proposals, and reports are scanned quickly. A misplaced apostrophe signals carelessness even when the content is sound.
• Published content.
  Books, articles, and web copy go through multiple proofreading stages for a reason. A single its / it's error in a finished book undermines reader trust.

Frequently Asked Questions

When do you use "it's" versus "its"?

Use it's (with an apostrophe) when you mean "it is" or "it has." For example: It's time to leave. Use its (without an apostrophe) when you mean "belonging to it." For example: The cat licked its paw. If you can replace the word with "it is" or "it has" and the sentence still makes sense, use it's. If not, use its.

What does "its" mean?

Its without an apostrophe is the possessive form of "it." It indicates that something belongs to or is associated with a thing or animal. Examples include its cover, its argument, and its conclusion. The word works the same way as his or her but is used for things rather than people.

Is "its'" ever correct?

No. Its' with an apostrophe after the word is never correct in standard English. The possessive pronoun is always its with no apostrophe. Only use an apostrophe when you mean the contraction "it is" or "it has," in which case the apostrophe goes between the t and the s: it's.

Why doesn't "its" have an apostrophe?

Possessive pronouns in English never take apostrophes. The same rule applies to his, hers, ours, yours, and theirs. The 's at the end of these words isn't a possessive marker. It's part of the word itself. Apostrophes in English signal missing letters, as in contractions like don't or won't, or possession on regular nouns, as in Mary's bike. Possessive pronouns belong to neither category.

Can "it's" mean "it has"?

Yes. It's can be a contraction of either "it is" or "it has." The two work in different contexts. It's a long way to go means "it is a long way to go." It's been a long day means "it has been a long day." Read the sentence in full to determine which expansion fits.

Why do people get this wrong so often?

Most possessive nouns in English use an apostrophe followed by s, like Mary's bike or the dog's tail. People expect possession to come with an apostrophe. The exception for personal pronouns including its, his, hers, theirs, ours, and yours is counterintuitive. Autocorrect software also sometimes inserts an apostrophe automatically, which compounds the error.

Is "its" a possessive pronoun or a possessive adjective?

Linguists use both terms. Some call its a possessive pronoun and others call it a possessive determiner or possessive adjective. The function is the same: to show that something belongs to or is associated with a thing or animal. The grammatical label doesn't change how the word is used.

How do I teach the difference to a child or student?

Start with the substitution test. Have the student read the sentence aloud and replace the word with "it is." If the sentence still makes sense, the contraction it's is correct. If not, the possessive its is correct. Pair this with the apostrophe rule: an apostrophe always means letters are missing. With practice, the rule becomes automatic.

Are "it's" and "its" homophones?

Yes. The two words are pronounced exactly the same. They're homophones, like there, their, and they're. The difference exists only in writing. This is why the error is so common in casual writing and why proofreading matters.

Should I use contractions in formal writing?

Most academic style guides discourage contractions in formal writing. Replace it's with "it is" or "it has." Replace don't with "do not," won't with "will not," and so on. In business writing and journalism, contractions are usually fine. In creative writing and casual content, contractions help the writing sound natural.

More Commonly Confused Words

It's and its are part of a broader pattern in English: words that sound the same or look almost the same but mean different things. Other word pairs that cause regular confusion include:

• Advice vs. Advise. The noun ends in "c," the verb ends in "s." Same Latin root, different functions.
• Break vs. Brake. Two homophones with completely different meanings, often confused in writing.
• Which vs. That. Two relative pronouns that follow specific rules in formal English.
• Diagnosis vs. Diagnoses. A Greek-origin singular and plural pair that follows different rules from standard English plurals.

When to Get Help with Your Writing

Confusing it's and its is a small error. Reviewers, instructors, and clients notice. The cumulative effect of small word-choice errors is what often turns polished writing into work that needs revision.

AI grammar checkers regularly miss this exact mistake because both forms are valid English words. Some autocorrect tools actively introduce the error by changing its to it's automatically. A human editor catches errors that automated tools don't.

Editor World provides professional proofreading services, academic editing, and business document editing for clients worldwide. Every editor is a native English speaker from the United States, the United Kingdom, or Canada. Each holds an advanced degree and averages 15 years of professional editing experience. Every document is reviewed by a real person, never by AI. To see who would be working on your document, you can choose your own editor from the Editor World roster. You can also request a free sample edit of up to 300 words before committing to a full edit. Pricing is fully transparent through an instant price calculator.

This article was reviewed by the Editor World editorial team. Editor World, founded in 2010 by Patti Fisher, PhD, provides professional editing and proofreading services for students, academics, researchers, and businesses worldwide. BBB A+ accredited since 2010 with 5.0/5 Google Reviews and 5.0/5 Facebook Reviews. More than 100 million words edited for over 8,000 clients in 65+ countries.